I liked how SimCopter actually used the same systems as SimCity 2000, with cop cars coming from police stations and fire trucks from the firefighters. Well thought out SimCity maps actually made your live easier, rather than being window dressing.

I wish someone would bring back the concept. There was a SimCopter mod for Cities: Skylines back when it first released, though I think it was abandoned. That would be the perfect game for it, since half of SimCopter was dealing with traffic and Skylines had an amazing traffic simulation.

Mostly, I just liked the Apache helicopter you could use to blow everything up

Until you hit a nuclear power plant and it wiped out half the city (and probably fried your copter too) once it burned down.